[Fluorescence anisotropy--a parameter for characterizing membrane fluidity].
The lipophilic fluorescent probe diphenylhexatriene (DPH) has been shown previously to behave as a marker of plasma membrane in living cell systems, and it is therefore been widely used in membrane fluidity studies via fluorescence anisotropy measurements. The anisotropic coefficient, which is inversely related to the rotational motion of the probe in membrane phospholipids, was significantly higher at 37 degrees C than at 23 degrees C for 9 series of red blood cells ghosts obtained from three healthy subjects. We also have studied the importance of the nature of two different polaroid films which permits the observation of fluorescence polarization.
Miron
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S
Catedra de Biofizică şi Medicină Nucleară, Facultatea de Medicină, Universitatea de Medicină şi Farmacie Gr. T. Popa, Iaşi.
Rusu
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D004161:Diphenylhexatriene; D004910:Erythrocyte Membrane / Q000737:chemistry*; D005374:Filtration / Q000295:instrumentation; D005454:Fluorescence Polarization / Q000295:instrumentation / Q000379:methods / Q000706:statistics & numerical data; D005456:Fluorescent Dyes; D006801:Humans; D008560:Membrane Fluidity; D012016:Reference Values; D013696:Temperature
D005456:Fluorescent Dyes; D004161:Diphenylhexatriene
Anizotropia fluorescenţei--parametru de caracterizare a fluidităţii membranare.